/*
 * Copyright (C) 2022-2024 Huawei Device Co., Ltd.
 * Licensed under the MIT License, (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://opensource.org/licenses/MIT
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import Queue from '@ohos.util.Queue';
import { Subscription } from './Subscription';
import ArrayList from '@ohos.util.ArrayList';
import { LogUtil } from '../../../../utils/LogUtil';

export class SubQueue {
  private static sInstance: SubQueue;
  private subQueue: Queue<Subscription> = new Queue<Subscription>();

  private constructor() {
  }

  static getInstance(): SubQueue {
    if (!SubQueue.sInstance) {
      SubQueue.sInstance = new SubQueue();
    }
    return SubQueue.sInstance;
  }

  getSubQueue(): Queue<Subscription> {
    return this.subQueue;
  }

  addSub(sub: Subscription) {
    try {
      this.subQueue.add(sub);
    } catch (e) {
      LogUtil.error(e);
    }
  }

  public addAllSub(subscriptions: ArrayList<Subscription>) {
    if (!subscriptions || subscriptions.length == 0) {
      return;
    }
    try {
      subscriptions.forEach((v, i) => {
        this.subQueue.add(v);
      })
    } catch (e) {
      LogUtil.error(e);
    }
  }
}